Pilot-Scale Experiments of Continuous Regeneration of Ceramic Diesel Particulate Filter in Marine Diesel Engine Using Nonthermal Plasma-Induced Radicals

Kuwahara, Taishi; Yoshida, Keiichiro; Hanamoto, Kenichi; Sato, Kazutoshi; Kuroki, Tetsuo; Yamamoto, Toshiaki; Okubo, Masaaki

doi:10.1109/tia.2012.2209389

Cited by 23 publications

(4 citation statements)

References 13 publications

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“…Three white parts on the DPF after regeneration are observed, i.e., DPF is partially regenerated. In the previous study [7], [8], we showed that this partial DPF regeneration is more effective than a global homogeneous regeneration. Thus, effective regeneration is achieved in the present study.…”

Section: B Dpf Regeneration For Pm Removalmentioning

confidence: 95%

A Pilot-Scale Experiment for Total Marine Diesel Emission Control Using Ozone Injection and Nonthermal Plasma Reduction

Kuwahara

Yoshida

Hanamoto

et al. 2015

IEEE Trans. on Ind. Applicat.

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Due to the fact that it is difficult to fulfill the recent stringent regulations governing marine diesel engine emission by means of combustion improvement alone, an effective aftertreatment technology is required to achieve the efficient simultaneous removal of NO x and particulate matter (PM). In the present study, we designed and investigated an effective aftertreatment system that employs a combination of ozone injection and nonthermal plasma (NTP) reduction for a marine diesel engine. The proposed technology offers the advantage of not requiring precious-metal catalysts and harmful heavy-metal catalysts as well as urea solution. In this aftertreatment system, PM in the exhaust gas is first captured by a ceramic diesel particulate filter. Subsequently, the deposited PM is oxidized and removed by NTP-induced ozone injection. After the PM treatment, NO x in the exhaust gas is treated by adsorption followed by NTP-combined desorption and reduction processes. These processes are repeated periodically, and total emission control is achieved. Since the deposited PM and the desorbed NO x are treated at a high-concentration state by ozone and oxygen-lean NTP, a higher performance for total marine diesel emission control is recorded. The maximum efficiencies of NO x and PM reduction were 94% and 95%, respectively.Index Terms-Adsorbent, aftertreatment, diesel particulate filters (DPFs), marine diesel engine, marine diesel oil (MDO), nonthermal plasma (NTP), NO x , ozone, particulate matter (PM).

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Section: B Dpf Regeneration For Pm Removalmentioning

confidence: 95%

A Pilot-Scale Experiment for Total Marine Diesel Emission Control Using Ozone Injection and Nonthermal Plasma Reduction

Kuwahara

Yoshida

Hanamoto

et al. 2015

IEEE Trans. on Ind. Applicat.

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“…Subsequently, the flow velocity is measured by a set of pitot tubes (L type, FV-21A, OKANO WORKS, Ltd. Japan). The accumulated PM in the DPF is treated using NTP-induced ozone (O 3 ) injection technology, as we previously reported [2,31]. After the PM removal, the NO x in the exhaust gas is treated via adsorption and desorption processes with NTP in the same way as the previous experiment [2] as well as the measurements.…”

Section: Stroke Of Cylinder MM 300mentioning

confidence: 95%

High Reduction Efficiencies of Adsorbed NOx in Pilot-Scale Aftertreatment Using Nonthermal Plasma in Marine Diesel-Engine Exhaust Gas

et al. 2019

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An efficient NOx reduction aftertreatment technology for a marine diesel engine that combines nonthermal plasma (NTP) and NOx adsorption/desorption is investigated. The aftertreatment technology can also treat particulate matter using a diesel particulate filter and regenerate it via NTP-induced ozone. In this study, the NOx reduction energy efficiency is investigated. The investigated marine diesel engine generates 1 MW of output power at 100% engine load. NOx reduction is performed by repeating adsorption/desorption processes with NOx adsorbents and NOx reduction using NTP. Considering practical use, experiments are performed for a larger number of cycles compared with our previous study; the amount of adsorbent used is 80 kg. The relationship between the mass of desorbed NOx and the energy efficiency of NOx reduction via NTP is established. This aftertreatment has a high reduction efficiency of 71% via NTP and a high energy efficiency of 115 g(NO2)/kWh for a discharge power of 12.0 kW.

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“…Plasma-chemical hybrid process (PCHP) is a relatively recent technology for purifying exhaust gases that combines plasma and chemical processes. This technology is expected to be a highly efficient and energy-saving system that protects the global environment by eliminating NO x emissions from the combustion of boilers, marine diesel engines, industrial incinerators, and diesel generators, [7][8][9][10][11][12][13][14][15][16][17] as well as semiconductor manufacturing exhaust gas. [18] The plasma component of the PCHP oxidizes NO using O 3 generated by a nonthermal plasma, while a sodium sulfite (Na 2 SO 3 ) solution is used to chemically reduce the generated NO 2 .…”

Section: Introductionmentioning

confidence: 99%

Energy‐saving glass‐melting‐furnace with semi‐dry plasma‐chemical hybrid process

Yamasaki

Nishioka

Fukuda

et al. 2023

Plasma Processes & Polymers

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A low‐cost plasma‐chemical hybrid process (PCHP) is proposed for simultaneous NOx and SOx treatment. PCHP can be integrated into existing desulfurization reactors by combining plasma oxidation and chemical reduction. PCHP is applied to glass melting furnace emissions with limited denitration technology, achieving higher removal efficiencies of NO, NOx, and SO2 (43%, 38%, and 28%, respectively) by optimizing reductant spray and installation angles. PCHP also improves fuel consumption, with a 0.04 increase in air ratio reducing energy consumption by 3.6 kL/day (equivalent to 6.6 t(CO2)/day reduction). In addition, PCHP allows for the collection and reuse of treated SO2 as sodium sulfate particles, making it a suitable aftertreatment technology for glass manufacturing exhaust.

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Pilot-Scale Experiments of Continuous Regeneration of Ceramic Diesel Particulate Filter in Marine Diesel Engine Using Nonthermal Plasma-Induced Radicals

Cited by 23 publications

References 13 publications

A Pilot-Scale Experiment for Total Marine Diesel Emission Control Using Ozone Injection and Nonthermal Plasma Reduction

A Pilot-Scale Experiment for Total Marine Diesel Emission Control Using Ozone Injection and Nonthermal Plasma Reduction

High Reduction Efficiencies of Adsorbed NOx in Pilot-Scale Aftertreatment Using Nonthermal Plasma in Marine Diesel-Engine Exhaust Gas

Energy‐saving glass‐melting‐furnace with semi‐dry plasma‐chemical hybrid process

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